In order to obtain the maximum possible information from these fields, it is very important to have a deeper insight of their physical properties. Although the vector approach is the most common method used in electromagnetic theory, several interesting works have used a scalar formalism [1]}, such as [2]} and [3]}. We use the scalar approach in order to obtain the fundamental dynamic quantities of those beams; dynamic quantities are present in several physical phenomena which occur in different contexts and scenarios, but are nevertheless governed by the same physical laws. To the best of our knowledge, the complete general explicit expressions have not been presented before; as a matter of fact, the Maxwell stress tensor has been scarcely mentioned in the previously published literature. Additionally, by considering the interference between modes, our results can give new insights.
